Live soil temperature · 2 inches down
Soil temperature in Riverside, CA
Right now · 92501
66°FActive
Annual bluegrass (Poa annua) and winter annual weeds: Window is closing: soil is below 70°F, so annual bluegrass is germinating now. Pre-emergent is a product that stops weed seeds before they sprout, so it only works ahead of germination.
By depth
- Surface
- 62.8°F
- 2 in depth
- 66°F
- 6 in depth
- 71.8°F
Past 14 days · 24-hour average
This week in Riverside
Over the past week, soil 2 inches down in Riverside, CA ranged from 69.6°F to 87.1°F and fell 16.2°F, averaging 82°F.
| Day | Surface | 2 in | 6 in |
|---|---|---|---|
| Mon | 87.3°F | 85.8°F | 83.7°F |
| Tue | 88.6°F | 87.1°F | 85.1°F |
| Wed | 87°F | 86.4°F | 85.1°F |
| Thu | 84.3°F | 84.6°F | 84.2°F |
| Fri | 81°F | 82.5°F | 83°F |
| Sat | 75.8°F | 77.8°F | 80.5°F |
| Sun | 66.4°F | 69.6°F | 74.9°F |
Daily averages from Open-Meteo for Riverside, CA 92501. Readings refresh every six hours.
Interpretation
What this means for your grass.
- Bermuda
- Bermuda is still growing, but the season is turning. This is the fall pre-emergent window: get it down before soil falls below 70°F, which is when annual bluegrass and other winter weeds start to germinate.
- Zoysia
- Zoysia is still growing and the season is turning. This is the fall pre-emergent window: get it down before soil falls below 70°F. Ease off nitrogen so you aren't pushing growth into dormancy.
- St. Augustine
- St. Augustine's growth is winding down and the fall pre-emergent window is closing: soil is at or below 70°F, so annual bluegrass is germinating. Apply now if you haven't, and expect to treat some weeds that are already up.
- Cool-season
- Cooling out of summer stress and starting to recover. Fall feeding and seeding start here. Pre-emergent and overseeding cannot go down together, so pick one before you buy.
Nearest readings
Soil temperature near Riverside
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Weather data from Open-Meteo. Timing guidance follows the sources on when to apply pre-emergent and how to use soil temperature.Data as of Mon, 12 Oct 2026 00:07:02 GMT